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Full text of "The manufacture and properties of iron and steel"

316
METALLTJBGY OF IRON AND STEEL.
TABLE XVI-D.
Comparison of Eye-Bar Flats with the Preliminary Test.
	Preliminary test; ?£-inch rolled round; natural.					Longitudinal strip ; cut near edge of eye-bar; natural.				
		i"2	^	•-			'"8	•o	a	
		f!	fj	I			a! £x	ti d§	3	t*
1	all	•43   QJ "P.	15	"3	5 43    .	f»S a art	fc,	dp,	Sj	1-
1	^•Ss	1|.	SoT	o'S !S G?	*<P	•^Tj®	-2^	£«"	Ta V	™d
a	•SflcS		SriS	^0	.2 o	•2 ri S	rt d ^	Si-S	00	•S V
43	•ga*	a d *§	do	**«	-W j^	BS§	R d*u	d o		to ^
9	lw	3 p*S	l~		JH Pi	las'	Spin	§5	"gft	3s,
W		p		K	W	H	P	H	M	w
1	42220	71820	26.25	53.47	58.8	40710	68880	27.00	47.18	69.1
	41900	66440	28.25	58.96	68.1	41570	71400	26.25	60.08	58.2
8	41830	69760	25.00	62.94	59.3	89780	69460	25.75	44.31	57.8
4	42440	78640	25.00	65.86	67.6	40880	69400	25.00	48.41	68.0
6	41880	74470	26.25	63.87	66.2	41480	72820	24.50	46.78	67.4
6	43570	72720	24.50	54.48	69.0	41810	78640	28.76	36.54	66.1
7	43210	70240	27.50	68.21	61.5	40870	72060	25.60	40.00	66.0
8	41890	68640	25:00	66.00	61.0	41900	76700	25.75	-48.76	64.0
8	42020	69390	28.76	57.14	60.6	41070	69680	27.00	44.33	689
Av.	42278	70791	26.28	55.61	59.7	41008	71409	26.62	44.60	67.4
phosphorus, 0.014 per cent.; manganese, 0.37 per cent.; sulphur, 0.027 per cent.
SEC. XVId.—Parallel-sided and grooved tests,—The United States Treasury Department prescribed the grooved test on marine boiler steels up to the year 1895. The relation existing between the two different systems is shown in Table XVI-F, which gives the results obtained by the Lukens Iron and Steel Company, " Coatesville, Pa. from duplicate strips cut side by side from the same plate.
SEC. XYIe.—Effect of shoulders at the ends of test-pieces.— The flow of force, by which the tensile tests on the grooved section are rendered almost worthless, occurs also in 2-inch test-pieces when there are shoulders at each end. The difference is
TABLE XVI-E. Longitudinal and Transverse Strips from Plates.
Composition,percent.: 0,0.17; P, .014; Mn,0.87; B, .027.
Average of 100 plates.	Longitudinal.	Transverse.
Ultimate strength; pounds per square inch  . . Elastic limit; pounds per square inch .....	56960 83350	54540 82260
Elongation in 8 inches ; per cent ........	27.46	27.90
Reduction of area; percent ........ .   . .	51.07	60.87